Class TipWindow

src/widgets/ASlider.cpp:147–617

//

class TipWindow final : public wxFrame
{
 public:
   TipWindow(wxWindow *parent, const TranslatableStrings & labels);
   virtual ~TipWindow() {}

   wxSize GetSize() const;
   void SetPos(const wxPoint & pos);
   void SetLabel(const TranslatableString & label);

private:
   void OnPaint(wxPaintEvent & event);

private:
   TranslatableString mLabel;
   int mWidth;
   int mHeight;
   wxFont mFont;

   DECLARE_EVENT_TABLE()
};

BEGIN_EVENT_TABLE(TipWindow, wxFrame)
   EVT_PAINT(TipWindow::OnPaint)
END_EVENT_TABLE()

TipWindow::TipWindow(wxWindow *parent, const TranslatableStrings & labels)
:  wxFrame(parent, wxID_ANY, wxEmptyString, wxDefaultPosition, wxDefaultSize,
           wxFRAME_SHAPED | wxNO_BORDER | wxFRAME_NO_TASKBAR | wxFRAME_FLOAT_ON_PARENT )
{
   SetBackgroundStyle(wxBG_STYLE_PAINT);
   SetBackgroundColour(wxTransparentColour);

   mFont.SetPointSize(sliderFontSize);
   mFont.SetFamily(wxFONTFAMILY_SWISS);
   mFont.SetStyle(wxFONTSTYLE_NORMAL);
   mFont.SetWeight(wxFONTWEIGHT_NORMAL);

   mWidth = mHeight = 0;
   for ( const auto &label : labels ) {
      int width, height;
      GetTextExtent(label.Translation(), &width, &height, NULL, NULL, &mFont);
      mWidth =  std::max( mWidth,  width );
      mHeight = std::max( mHeight, height );
   }

   // Pad to allow for curved corners
   mWidth += 8;
   mHeight += 8;

#if defined(__WXMAC__)
   // Use a bitmap region to set the shape since just adding an unfilled path
   // will make the window transparent
   wxBitmap shape(mWidth, mHeight);
   wxMemoryDC dc(shape);

   dc.SetPen(*wxBLACK_PEN);
   dc.SetBrush(*wxBLACK_BRUSH);